Mandrill: wp_mail has been declared by another process or plugin, so you won’t be able to use Mandrill until the problem is solved.
Troubleshoot this Mandrill-related clash on your WordPress website. The following error message may be produced if the WordPress plugin Mandrill is installed and activated while there exists another plugin on your WP setup which tinkers with the email settings on your WordPress: wp_mail has been declared by another process or plugin, so you won’t be …